Metamaterial electro-optic switch of nanoscale thickness

被引：278
作者：
Samson, Z. L. [1 ]
MacDonald, K. F. [1 ]
De Angelis, F. [2 ,3 ]
Gholipour, B. [1 ]
Knight, K. [1 ]
Huang, C. C. [1 ]
Di Fabrizio, E. [2 ,3 ]
Hewak, D. W. [1 ]
Zheludev, N. I. [1 ]
机构：
[1] Univ Southampton, Optoelect Res Ctr, Southampton SO17 1BJ, Hants, England
[2] Fdn Ist Italiano Tecnol, NanoBioSci Lab, I-16163 Genoa, Italy
[3] Magna Graecia Univ Catanzaro, BIONEM Lab, I-88100 Catanzaro, Italy
来源：
APPLIED PHYSICS LETTERS | 2010年 / 96卷 / 14期
基金：
英国工程与自然科学研究理事会;
关键词：
chalcogenide glasses; dielectric properties; electron spin polarisation; electro-optical switches; metamaterials; photoemission; PHASE-CHANGE MATERIALS;
D O I：
10.1063/1.3355544
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We demonstrate an innovative concept for nanoscale electro-optic switching. It exploits the frequency shift of a narrow-band Fano resonance mode in a plasmonic planar metamaterial induced by a change in the dielectric properties of an adjacent chalcogenide glass layer. An electrically stimulated transition between amorphous and crystalline forms of the glass brings about a 150 nm shift in the near-infrared resonance providing transmission modulation with a contrast ratio of 4:1 in a device of subwavelength thickness.
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页数：3
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